Do your plastic "ears" break frequently when you ship 5L's and HP-1100's? But to buy replacements is very costly. So, instead, use the Reinforcer™ to reinforce the plastic "ear" so it will never break. At 30˘, you can't go wrong. It is like having an insurance policy to prevent these defects. Now you can avoid the customer calls and stop having to send free replacements. As your empty cartridges are retired, you may re-use the encaps that have the Reinforcer installed. Who ever thought insurance would only cost 30˘?